A] 4(2 1/2a-1 1/4b)-3(2a-1 1/2b)-2(-1 1/4a-1 3/4b)
10a-5b-6a+4 1/2b+2 1/2a+3 1/2b
6 1/2a+4b
B] 2 1/2(a-2b)-1/4(3a-5b)+1 1/4(2a-3b)
2 1/2a-5b-3/4a+1 1/4b+2 1/2a-3 3/4b
4a-7 1/2b
C] 0.4(3a+2b)-0.3(-6a+b)-0.7(2a-3b)
1.2a+0.8b+1.8a-0.3b-1.4a+2.1b
1.6a+1.6b
D] -1.3(-2a+3b)-2.1(a-2b)-0.5(5a-2b)
1.6a-1.9b-2.1a+2.2b-2.5a+b
0.5a+1.3b
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A] 4(2 1/2a-1 1/4b)-3(2a-1 1/2b)-2(-1 1/4a-1 3/4b)
10a-5b-6a+4 1/2b+2 1/2a+3 1/2b
6 1/2a+4b
B] 2 1/2(a-2b)-1/4(3a-5b)+1 1/4(2a-3b)
2 1/2a-5b-3/4a+1 1/4b+2 1/2a-3 3/4b
4a-7 1/2b
C] 0.4(3a+2b)-0.3(-6a+b)-0.7(2a-3b)
1.2a+0.8b+1.8a-0.3b-1.4a+2.1b
1.6a+1.6b
D] -1.3(-2a+3b)-2.1(a-2b)-0.5(5a-2b)
1.6a-1.9b-2.1a+2.2b-2.5a+b
0.5a+1.3b